Though they may seem antiquated and unnecessary, knowing the proper hand driving-signals can be a lifesaver if your turn signals or brake lights fail. But unless youâre a centenarian, a driving test instructor, or both (highly unlikely), you might not remember how hand driving-signals work.
Climate Data. Standardized Precipitation Index (SPI) The Standardized Precipitation Index (SPI) is a widely used index to characterize meteorological drought on a range of timescales. On short timescales, the SPI is closely related to soil moisture, while at longer timescales, the SPI can be related to groundwater and reservoir storage.
(Service Profile IDentifier) A number assigned to an ISDN line by the telephone company that indicates which services the ISDN device can access. The SPID is used by the central office switch, and depending on the type of switch, either one or two SPIDs or none at all are required per line. The SPID is usually the 10-digit ISDN telephone number with a couple of extra digits tacked on.